That is a very interesting view on things, and I would not be at all surprised if it's the truth. Valve need only devote minimal resources to keep it shelved wh

That is a very interesting view on things, and I would not be at all surprised if it's the truth. Valve need only devote minimal resources to keep it shelved while making sure it's updated just enough to be able to rapidly deploy, at the same time that ProtonDB ensures a good % of the library is immediately available. Gamers are minority of PC users, but a little over 10% of PC's shipped are still gaming-level. Some of those are probably purchased for graphic designs and/or video editing, but the gaming segment would still be substantial enough that Windows wouldn't want to lose it. Not because of the immediate revenue loss: In the beginning you'd still probably have to pay a MS tax if you weren't building your own PC, or you wanted a laptop (and gaming laptops are a large part of the gaming market). Once 10% of the market was installing Linux, that's a foot in the door MS really wouldn't like.